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| 黄土高原切沟空间分布特征 | |
| 引用本文： | 苏建华1,2,王春梅1,2,庞国伟1,2,杨勤科1,2,仲 原1,2,杨丽娟1,2,杨安南1,2,刘宝元3,4. 黄土高原切沟空间分布特征[J]. 水土保持研究, 2023, 30(1): 134-143,153. DOI: 10.13869/j.cnki.rswc.2023.01.028 |
| 作者姓名： | 苏建华1 2 王春梅1 2 庞国伟1 2 杨勤科1 2 仲 原1 2 杨丽娟1 2 杨安南1 2 刘宝元3 4 |
| 作者单位： | (1.陕西省地表系统与环境承载力重点实验室, 西安 710127; 2.西北大学 城市与环境学院, 西安710127; 3.北京师范大学 自然科学高等研究院, 广东 珠海 519087; 4.北京师范大学 地理科学学部地表过程与资源生态国家重点实验室, 北京 100875) |
| 基金项目： | 国家自然科学基金(41977062,41601290)；;国家重点实验室开放基金(A314021402-2016)； |
| 摘 要： | 在区域尺度研究切沟空间分布特征，对黄土高原切沟防治及黄河中游水土保持工作具有重要意义。研究以系统抽样的方法布设256个小流域抽样单元，基于Google Earth亚米级遥感影像，采用人工目视解译的方法，对黄土高原切沟空间分布特征展开研究，结果表明：(1) 92个抽样单元存在切沟，占抽样单元总数35.94%。黄土高原切沟密度均值为1.47 km/km2,以小切沟为主。切沟长度、宽度、距分水岭距离均值分别为43.53 m, 6.30 m, 71.19 m。(2)黄土高原切沟主要分布在400 mm等降雨量线附近，尤其是延安及其以西至固原一带，榆林及其以北至东胜一带，小切沟分布与切沟总体分布基本一致，大切沟分布相对分散，在天水—定西一带最为突出。(3)黄土高原切沟所在坡面目前土地利用类型主要为草地(48.51%)、耕地(29.76%)、林地(17.27%)。研究可为黄土高原侵蚀沟分区治理规划提供理论依据。 |
| 关 键 词： | 黄土高原 亚米级遥感影像 目视解译 切沟 空间分布 |
Spatial Distribution of Gullies in the Loess Plateau |
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| SU Jianhua1,2,WANG Chunmei1,2,PANG Guowei1,2,YANG Qinke1,2,ZHONG Yuan1,2,YANG Lijuan1,2,YANG Annan1,2,LIU Baoyuan3,4. Spatial Distribution of Gullies in the Loess Plateau[J]. Research of Soil and Water Conservation, 2023, 30(1): 134-143,153. DOI: 10.13869/j.cnki.rswc.2023.01.028 | |
| Authors: | SU Jianhua1 2 WANG Chunmei1 2 PANG Guowei1 2 YANG Qinke1 2 ZHONG Yuan1 2 YANG Lijuan1 2 YANG Annan1 2 LIU Baoyuan3 4 |
| Affiliation: | (1.Shaanxi Key Laboratory of Surface System and Environmental Carrying Capacity, Xi'an 710127, China; 2.College of Urban and Environmental Sciences, Northwest University, Xi'an 710127, China; 3.Higher Research Institute of Natural Sciences, Beijing Normal University, Zhuhai, Guangdong 519087, China; 4.State Key Laboratory of Earth Surface Processes and Resource Ecology, School of Geography, Beijing Normal University, Beijing 100875, China) |
| Abstract: | The exploration on the spatial distribution of gullies at the regional scale is of great importance to the prevention and control of gullies in the Loess Plateau, as well as the soil and water conservation planning in the middle reaches of the Yellow River. In this paper, based on Google Earth sub-meter remote sensing images, 256 small watershed sampling units were arranged using the systematic sampling method, and the spatial distribution characteristics of gullies in the Loess Plateau were studied adopting the visual interpretation method. The results reveal that:(1)gullies were found in 92 sampling units, accounting for 35.94% of the total number of sampling units; the average density of gullies in the Loess Plateau reaches 1.47 km/km2, mainly in small gully; the mean values of the gullies length, width and distance from hill top were 43.53 m, 6.30 m and 71.19 m, respectively;(2)gullies in the Loess Plateau mainly distributed near the 400 mm isohyetal line, especially in Yan'an and its west to Guyuan, Yulin and its north to Dongsheng, the distribution of small gullies was basically consistent with the overall distribution of gullies; meanwhile, the distribution of large gullies was relatively scattered and most of them are prominent in Tianshui and Dingxi;(3)at present, the gullies are located the types of the land use of the slope mainly including grassland(48.51%), cultivated land(29.76%)and forest land(17.27%)in the Loess Plateau. These results can provide a theoretical basis for the zoning treatment planning of gullies erosion in the Loess Plateau. |
| Keywords: | Loess Plateau sub-meter remote sensing image visual interpretation gullies spatial distribution |
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